Attachment for cutter grinders



Dec. 5, 1939. R. K. LE BLOND ATTACHMENT FOR CUTTER GRINDERS Filed June 14, 1959 5 Sheets-Sheet l INVENTOR. RICHARD K. LE BLOND ATTORNEY.

Dec. 5, 1939. R. K. LE BLOND ATTACHMENT FOR CUTTER GRINDERS s sheets-sheet 2 Filed June 14, 1939 INVENTOR. C HARD K. LE BLOND ATTORNEY.

Dec. 5, 1939. R. K. LE BLOND ATTACHMENT FOR CUTTER GRINDERS Filed June 14, 1939 3 Sheets-Sheet.3

4 INVENTOR;

R\CHARD K. LEBLOND A ORNEY.

Gil

Patented Dec. 5, 1939 2,182,231 ATTACHMENT FOR CUTTER GRINDERS Richard K. to The R.

Le Blond,

Cincinnati, Ohio, K. Le Blond Machine Tool Company,

Cincinnati, Ohio, a corporation of Delaware Application June 14, 1939, Serial No. 279,154

10 Claims.

rangement for universally mounting the grinding wheel on the supporting stump of a cutter grinder as shown in said application 203,368.

One object of this invention is to arrange the wheel when operating on the work.

Another object is to provide an improved arrangement for accurately adjusting and locating the bevel gearing for quiet and s oothoperation of the grinding wheel spindle.

A further object is to provide a more accessible arrangement for installing or removing the driving belt of the attachment.

manually actuated.

Further objects and advantages of this invention will appear from the following description of the drawings in which:

Figure I is a perspective showing the attachment applied thereto.

Figure H is a vertical section through the attachment on the line IIII of Figures III, IV,

and V.

Figure In is a plan view of the attachment.

Figure IV is a vertical transverse section through the attachment on the line IV-IV of Figures II and Figure V is a front elevation of the attachment.

Noting particularly Figure I, the machine comprises a base i upon which is fixed and application set forth above. Surrounding and swiveling on the stump 2 is the column 3. Vertically slidable on the column 3 is the knee 6 on the top of which is horizontally slidable the saddle 1 in a direction radially of the axis of swiveling of the column 3. On the saddle is mounted the sliding table 8 which is reciprocatable in a direction perpendicular to the direction of movement of .the saddle 1 on the knee 6, A swivel table 9 is mounted on top of the sliding view of'a cutter grinder I the stump 2 on dove-tail guideways 4 and table 8 on which may be placed the various work holding fixtures.

The novel grinding attachment comprises a supporting housing which is split on the line In so as to form a lower portionllla on the'top of the stump 2 and an upper portion lob securely attached thereto l2. Formed in this housing is the bore l3 in which nicely fits the reciprocating cylindrical member I 4 which is-actuated by the hand crank l5 carried on the rock shaft l6 journaled in the upper portion lllb, this rock shaft having a pinion l1 fixed on it andengagingthe rack l8 cut integral with the cylidrical member l4. Stop dogs l9 adjustably carried in the T-slot disc 20 fixed to the rock shaft the abutment pin 2| fixed in the upper portion illb so as to give selectable degrees of limited reciprocatory movement to the cylindrical member I.

In order to lock in any position in the housing a locking device, best shown in Figure IV, is provided comprising two plungers 22 and 23 slidably mounted in a bore 24 extending tangentially of the bore. l3 of the housing. These plungers each have contacting surfaces 25 which engage the periphery of the cylindrical member l4 when drawn together by tightening the wing nut 26 on the stud 21 fixed loosened.

In order to completely protect the bearing surface 29 of the reciprocating cylindrical member where it projects abrasive material discharged. by the grinding wheel a bellows 30 is arranged to securely fit around the annular portion 3| of the housing and the integral annular flange portion 32 of the iii are arranged to engage the reciprocating member l4 outside of the bore l3 from all by suitable screws II and pins 31 which rotatably carry the pulley spindle 38 I having an integral pulley 39 over which passes v30 an appropriate access door in the base i.

cover-43 and the'upper half lflb are then redriving transmission ll without the necessity of completely removing the attachment from the 1 stump of the machine a simplified arrangement is provided while at the same time providing m means for keeping the important bearingsurfaca free from external abrasive and also foreign mat-- ter which may come from the rapidly moving driving belt 40. The reciprocating member I is moved to the left, Figure 11, until the opening 42 5 is directly over the pulley 39. The cover 43 (which keeps dust thrown oil by the belt 40 from getting to the bore l3 and also keeps lubricant from the bore is from getting on the belt 40) is removw. In order to do this it is.merely necessary to diszo connect the bellows at 8|, remove the screws Ii, and lift off the upper half lobe-of the housing. The remainder of the attachment stays in proper position on the machine. The belt 40 is then inserted through the opening 42 and passes over 5' (Figure IV) and down each side of the pulley 39 through the belt passageways It and 5 in the cylindrical member and thus into the stump 2 to the base of the machine where it may readily be connected to the drivin transmission through The placid ready for further operation of the attachmen In order to prevent all rotation of the cylindri- 35 cal member H in the bore 13 and to"prvlde the proper functional restraint'for the movement of this member, a key 46 is provided in the lower half Illa of the housing which is capable of careful adjustment by means of the screws 41 to efiect 40 the proper contact between the tapered upper portion 48 of the key and the mating keyway 49 formed in'the cylindrical member It. I On the flanged portion 32 of the reciprocating cylindrical member i4 is I 45 housing 50 which may be rotated about the axis-of said member M on the bearing surface and may be locked in any adjusted position by the bolts 52 which operate in the annular slot 53 against axial movement. In the quill 55 fixed w to the swivel housing 50 by the pin 56 is the drive shaft 51 which has a splined-portion 51a. slidingly engaging in the mating splined bore of the pulley spindle 38 so as to .at all times transmit power from the belt 40 to the shaft 5'! at any position of the member It. On the outer end of the shaft 51 is fixed a bevel gear 58 which drives the bevel gear 59 on the shaft 60 appropriately journaled at one end in "the bearing 6! carried in the swivel housing 50. The 60 other end of the shaft 60 has\a stem 62 carried in a pilot bore 63 formed in the shaft 64 which in turn is Journaled, eoaxlally with the I shaft 60 in bearings 55 and 66 in'the-quill I'I fixedv in the 'wheel spindle housing 68 by the pin 5 89. A driving coupling '60 and i4 is arranged to permit sumcient longitudinal relative'adlustment between the shafts- 80 and 64 to permit independent accurate adiustment between the bevel gears Stand 59 and 70 thebevel gears II and I2 inthe wheel spindle housing 68 which connect driving power from the shaft 66 to the grinding wheel spindle 13 having the grinding wheel 13:: in the bearings I4 and l5 in the housing 88. The grinding wheel hous- 75 ing 68 is capable of swivelling 'on the swivel holismounted the swivel- Ill between the shafts 'ing 50 around the axis of the shafts 60 and 64 being thus guided by the quill 61 which is free to rotate in the bore 16 in the housing 50. The

housing 68 may be locked in any desired position of swivelling by tightening appropriate 'I"- 5 slot bolts 'I'I operatingin the annular T-slot 18 formed in the housing 50. The provision of the coupling not only facilitates the initial careful adjustment of the bevel gearing but this also makes possible the removal or/and interchange- 10 ability of the wheel housing 68 without in any way disturbing the precise setting of the bevel gearing so essential to quiet and eflicient operation of the drive to the grinding wheel 13a.

Having thus fully'set forth and described my q invention, what I claim and desire to secure by United States Letters Patent is:

1. A grinding wheel mounting for .cutter grinder comprising a housing fixed on the stump a driving spindle journaled in said housing, means for driving said spindle, a cylindrical member reciprocatably mounted in and enclosed by said housings, a. grinding wheel spindle universally mounted on said member, a grinding wheel on said spindle, a splined shaft slidably engaging in a mating splined bore in said driving spindle and journaled in said member, and bevel gear transmission mechanism interconnecting said shaft with said grinding wheel spindle. 80 I 2; A grinding wheel mounting for cutter grinder comprising a cylindrical horizontally disposed housing fixed on the stump of said grinder,

a cylindrical member reciprocatably mounted in and enclosed by said housing, a driving spindle journaled in and supported by said housing inside of said member, a gri ding wheel spindle universally mounted on said member, a grinding wheel on said spindle; a splined shaft slidably engaging in a mating splined bore in said driving 0 spindle and journaled in said member, and bevel gear said shaft with said grinding wheel spindle.

3. A grinding wheel grinder comprising a cy drical housing fixed on w mounted on said member, a grinding wheel on said spindle, a splined shaft slidably engaging in a mating splined bore in said driving spindle and iournaled in said member, and bevel gear transmission mechanism interconnecting said shaft with said grinding wheel spindle.

4. A grinding wheel mounting fort cutter grinder comprising ahousing fixed on the stump of said grinder, a driving spindle lournaled in said housing, a cylindrical member reciprocatably mounted in said housing, means for preventing rotation of said member in said housing and for providing proper frictional restraint of reciprocatory movement of said member comprising a key adjustably mounted in said housing having a tapered portion slidinglyengaging a mating keywayin said member. 7

5. A grinding wh 1 mounting for cutter grinder comprising a housing fixed on the stump of said grinder, a driving spindle journaled in said housing, a cylindrical member reciprocatably -.mounted in said housing, means for locking said 76 member in any position'in said housing comprising a pair of plungers slidably mounted in a tangential bore relative to said cylindrical member,

abutment surfaces on said plungers adapted to engage the surface of said cylindrical member,

5 ably mounted in said housing, means for actuat ing said membe comprising a rock shaft journaled in said ho ing, a pinion fixedon said rock shaft adapted to operate in a rack formed in said member, and crank handle means for actuating 20 said rock shaft.

7. A grinding wheel mounting for cutter grinder comprising a'housing fixed on the stump of said grinder, 'a driving spindle journaled in said housing, a cylindrical member reciprocatably 5 mounted in said housing, means for actuating said member comprising a rock shaft journaled in said-housing, a pinion fixed on said rock shaft adapted to operate in a rack formed in said member, crank handle means for actuating-said rock 30 shaft, means 'for limiting the extent of movesaid rock shaft, abutment dogs adjustably mounted on said disc, and an abutment fixed on" said housing to be engaged by said dogs to limit 7 35 rotation of said rock shaft.

8, A grinding .wheel mounting for cutter grinder comprising a housing fixed on the stump of said grinder, a driving spindle journaled in said housing, a cylindrical member reciprocatably mounted in and projecting outwardly from said- 41) housing, universal mounting means for a grinding wheel carried on said projecting portion of amasaif -3 said member, power transmission means for en closing said driving spindle. and said gri din wheel, and means for enclosing the projecting portionof said cylindrical member comprising a bellows connected to said housing and the outer 5 end of the projecting portion of said cylindrical member.

9. ,A grinding wheel mounting for cutter grinder comprising a split cylindrical housing having a lower portion fixed on the stump of said 10 grinder and an upper portion removably mounted in said housing, a driving spindle mounted inside of said member and supported by said housing, a driving pulley on said spindle, a belt passing over said pulley down through said stump and connected to a sourse of power in thebase of said cutter grinder,-an access opening in said cylindrical member to permit placing said belt on said pulley and passing it downthrough said stump when said upper portion of said housingis removed, and .a closure for said access opening.

10. A grinding wheel mounting for cutter grinder comprising a housing 'mounted on the stump of said cutter grinder, a member recipro catably mounted on said'housin a universal as mounting means for a grinding wheel on said. member comprising a swivel housing mounted on. said member, a grinding wheel spindle housingmounted to swivel on said swivel housing, power transmission means for rotating the grinding 3o ment of said member comprising a disc fixed on wheel spindle in said spindle housing comprising a shaft carried in the housing mounted on the stump and driven by a source of power in the base of said grinder, a bevel gear fixed on said shaft adapted to drive a bevel gear on a shaft 1 carried in said swivel housing, coupling means between said last mentioned shafts, permitting relative axial movement between said shafts, and bevel gear transmission mechanism between said last mentioned shaft and said grinding wheel a spindle. 

